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When compiling C++ code with -mabi=ieeelongdouble, KCtype is unavailable and the long double type should be used instead. This is also providing macro __HAVE_FLOAT128_UNLIKE_LDBL in order to identify the kind of long double type is being used in the current compilation unit. Notice that bits/floatn.h cannot benefit from the new macro due to order of header inclusion. * bits/floatn-common.h: Define __HAVE_FLOAT128_UNLIKE_LDBL. * math/math.h: Restrict the prototype definition for the functions issignaling(_Float128) and iszero(_Float128); and template __iseqsig_type<_Float128>, from __HAVE_DISTINCT_FLOAT128 to __HAVE_FLOAT128_UNLIKE_LDBL. * sysdeps/powerpc/bits/floatn.h [__HAVE_FLOAT128 && (!__GNUC_PREREQ (7, 0) || defined __cplusplus) && __LDBL_MANT_DIG__ == 113]: Use long double suffix for __f128() constants; define the type _Float128 as long double; and reuse long double in __CFLOAT128. Signed-off-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
123 lines
4.4 KiB
C
123 lines
4.4 KiB
C
/* Macros to control TS 18661-3 glibc features on powerpc.
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Copyright (C) 2017-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _BITS_FLOATN_H
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#define _BITS_FLOATN_H
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#include <features.h>
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#include <bits/long-double.h>
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/* Defined to 1 if the current compiler invocation provides a
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floating-point type with the IEEE 754 binary128 format, and this glibc
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includes corresponding *f128 interfaces for it. */
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#if defined _ARCH_PWR8 && defined __LITTLE_ENDIAN__ && (_CALL_ELF == 2) \
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&& defined __FLOAT128__ && !defined __NO_LONG_DOUBLE_MATH
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# define __HAVE_FLOAT128 1
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#else
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# define __HAVE_FLOAT128 0
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#endif
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/* Defined to 1 if __HAVE_FLOAT128 is 1 and the type is ABI-distinct
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from the default float, double and long double types in this glibc, i.e.
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calls to the binary128 functions go to *f128 symbols instead of *l. */
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#if __HAVE_FLOAT128
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# define __HAVE_DISTINCT_FLOAT128 1
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#else
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# define __HAVE_DISTINCT_FLOAT128 0
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#endif
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/* Defined to 1 if the current compiler invocation provides a
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floating-point type with the right format for _Float64x, and this
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glibc includes corresponding *f64x interfaces for it. */
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#define __HAVE_FLOAT64X __HAVE_FLOAT128
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/* Defined to 1 if __HAVE_FLOAT64X is 1 and _Float64x has the format
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of long double. Otherwise, if __HAVE_FLOAT64X is 1, _Float64x has
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the format of _Float128, which must be different from that of long
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double. */
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#define __HAVE_FLOAT64X_LONG_DOUBLE 0
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#ifndef __ASSEMBLER__
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/* Defined to concatenate the literal suffix to be used with _Float128
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types, if __HAVE_FLOAT128 is 1. */
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# if __HAVE_FLOAT128
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# if !__GNUC_PREREQ (7, 0) || defined __cplusplus
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/* The literal suffix (f128) exist for powerpc only since GCC 7.0. */
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# if __LDBL_MANT_DIG__ == 113
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# define __f128(x) x##l
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# else
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# define __f128(x) x##q
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# endif
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# else
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# define __f128(x) x##f128
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# endif
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# endif
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/* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1. */
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# if __HAVE_FLOAT128
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# if __LDBL_MANT_DIG__ == 113 && defined __cplusplus
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typedef long double _Float128;
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# define __CFLOAT128 _Complex long double
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# elif !__GNUC_PREREQ (7, 0) || defined __cplusplus
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/* The type _Float128 exist for powerpc only since GCC 7.0. */
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typedef __float128 _Float128;
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/* Add a typedef for older GCC and C++ compilers which don't natively support
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_Complex _Float128. */
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typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__KC__)));
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# define __CFLOAT128 __cfloat128
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# else
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# define __CFLOAT128 _Complex _Float128
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# endif
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# endif
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/* The remaining of this file provides support for older compilers. */
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# if __HAVE_FLOAT128
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/* Builtin __builtin_huge_valf128 doesn't exist before GCC 7.0. */
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ())
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# endif
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/* The following builtins (suffixed with 'q') are available in GCC >= 6.2,
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which is the minimum version required for float128 support on powerpc64le.
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Since GCC 7.0 the builtins suffixed with f128 are also available, then
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there is no need to redefined them. */
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# if !__GNUC_PREREQ (7, 0)
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# define __builtin_copysignf128 __builtin_copysignq
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# define __builtin_fabsf128 __builtin_fabsq
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# define __builtin_inff128 __builtin_infq
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# define __builtin_nanf128 __builtin_nanq
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# define __builtin_nansf128 __builtin_nansq
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# endif
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/* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*,
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e.g.: __builtin_signbitf128, before GCC 6. However, there has never
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been a __builtin_signbitf128 in GCC and the type-generic builtin is
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only available since GCC 6. */
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# if !__GNUC_PREREQ (6, 0)
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# define __builtin_signbitf128 __signbitf128
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# endif
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# endif
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#endif /* !__ASSEMBLER__. */
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#include <bits/floatn-common.h>
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#endif /* _BITS_FLOATN_H */
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